Lewis metesseb



(No Model.) 2 Sheets-Sheet 1.

L. MBTE-SSER.

FURNACE.

Patented Sept. 28, 1884.

INVEM'OIZ )3 OM56 L X W J WINEL SES.

2 Sheets-$heet 2.

Patented Septf28; 1884.

FURNACE.

L. METESSER.

(No Model.)

LEWIS METESSER, OF INDIANAPOLIS, INDIANA.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 305,461, dated September 231, 1884:. Application filed September 10, 1883. (No model.)

To all whom it may concern Be it known that I, Lnwrs Mnrnssnn, a resident of Indianapolis, Marion county, Indiana, have made certain new and useful Improve ments in Furnaces, a description of which is set forth in the following specification, reference'being made to the accompanying drawings, in the several figures of which like letters indicate like parts.

My invention relates to the construction of furnaces for steam-boilers, and has forits object the prevention of smoke, the equal and uniform diffusion of the heat along the boiler, and the increase of heat from a given quantity of fuel, and will be understood from the following explanation and description.

. In the drawings, Figure 1 represents a 1ongitudinal section of the walls and the interior pipes,showing the arrangement of parts with the boiler in place. Fig. 2 is a longitudinal section on the line 00 m, Fig. 1. Fig. 3 is a vertical section on the line y y, Fig. 1, look-' ing toward the rear. Fig. 4 is a vertical section on the line 2 2, Fig. 1, looking from the front of the boiler. Fig. 5 is a front view, enlarged, showing the detail on the liner 1), Fig. 6, the steam-pipe sp being cut off, and the nipple n being in section. Fig. 6 is a longi tudinal section of the supply and distributing pipes and nipple showing the connections of the parts enlarged.

In detail, B is the boiler and S is the stack. 1 1 are the outer inclosing-walls, of brick. 2 2 are the fire-walls, which are carried up over the boiler, as shown in Fig. 4, at each end, and a covering, 20, Fig. 1, is carried over the top of the boiler,.connecting the ends of the walls 2, forming an expansion and heating chamber, ha, between the cover and the boiler, this chamber ha extending down the sides of the boiler and connecting with the combustion-chamber ch. The outer walls, 1, are also carried up over the boiler at each end, as shown in Fig. 4, and a cover 10, Fig. 2, is

carried up over the top of the boiler, resting at each end on wall 1, forming a dead-air chamber, ac, between the two covers, to pre- Vent radiation of heat. The outer cover, 10,

may be made of any suitable material.

ch is an expansion and combustion chamber, connected with the front combustion chamber by opening of, and by of with a secondary expansion-chamber, ch, between which and ch is arear bridge-wall, WV, the top of chamber ch being covered over, and the chamber itself opening directly into the flues Bf of the boiler B.

ac is a continuous air-space, between the outer and fire walls, as shown in Fig. 2. An opening is formed in the fire-walls 2 on either side, the ash-pit connectingthe latter with the air-space ac, so as to supply air fromthe ashpit to the pipe dp. These openings are shown at 0 in Fig. 3.

be is the boilersupport,'built up from wall W, central under the boiler, so as to stop the direct passage of the heated gases and deflect them into the open spaces ha on either side the support bs, as shown in Fig. 4.. The impact against D8 is followed by a rebound of the heated gases,,which tend to return again to the expansion-chamber ch, and assist in main taining therein a uniform degree of heat, as hereinafter described. 7

Between the combustion chamber proper and the expansion-chamber ch is afront bridgewall, bw, extending from the bottom to within a suitable distance of the boiler, leaving the opening of as ameans of communication between the two chambers. In the center of the wall bw is formed an air-flue, (If, constructed as shown in Figs. 1 and 3. The air enters from the ash-pit, under the grate-bars 9, through openings a ,into the space cf behind the front part of the wall bw, which, being next the fire, is hot, and therefore heats the current of air passing behind it through the space cf, and this air thus heated passes out into the firechamber through upper openings, af, which arepreferably, made smaller in area than the lower openings, of, to increase the force of the air-current. r

In order to supply more air to the furnace than would be drawn through the grate-bars in the ordinary way, I provide distributingpipes clp, which are placed in the air-spaces ac, Fig. 2, one on either side the fire-chamber, the forward ends of which are open, except a bridge, I), Fig. 5, across the center, leaving openings 0 above and below it, for the free admission of air from the air-space ac. In. the center of the bridge I) is an opening through which a smaller pipe or nipple, n, is passed, having an injecting-nozzle, I, on the inner end. This small pipe it passes through the furnace-front F a short distance, and is covered with an ordinary screw-cap, O.

From the distributing-pipe dp extend upward at suitable distances apart a series of smaller pipes, 12191), which are bent at right angles and pass through the fire-walls 2 a short distance above the grate-bars, so as to discharge air into the fire-chamber above the burning mass of fuel. A steam-pipe, sp, is connected by a T with the pipe n, for forcing the air through the pipe dp and pipes 2 into the fire-chamber when desired.

81) is a branch connecting the pipe sp with any other distributing-pipe.

ap is the ash-pit, and top is an inclined waa ter-pan at the bottom, for keeping the ash-pit cool, constructed so that the water at the rear By my device I accomplish the following.

results: All the air in the ash-pit that cannot get up through the grate-bars is carried through the openings af into the air-flue af, there heated and carried into the fire-chamber through the upper openings, a thus providing an additional quantity of oxygen to produce perfect combustion. purpose is provided by the pipes p on either side, the latter being capable of regulation, more or less, by the man in charge, while the supply through af is constant.

The spaces ha, as will be observed, are preferably circular in shape and are limited by such a construction of the wall "W that their total area is less than that of the boiler-flues. The object of this is to delay the passage of the products of combustion from the combustion-chambers, so that a greater per cent. of

the gases will be consumed than is ordinarily the case, and at the same time equalize the heat throughout the combustion-chambers.

The continuous air-chamber ac between the fire-walls and outer walls prevents an unequal expansion of the fire-walls and acts as a nonconductor, preventing radiation from within to the outside, and at the same time keeps the cold air out.

I am aware that air-spaces between outer and inner walls are not new; but I believe that no continuous air-space like mine has been heretofore known or used. Where the outer and inner walls are connected in sections, the unequal expansion of the inner or fire wall is not prevented.

The pipe to is extended through front F, for

facility in cleaning it, and is capped to prevent the steam from coming out.

The draft through openings 0 in pipe d1), Fig.5, carries up with it all foul gases in the Another supply of air forthis continuous air-space ac, and keeps them from passing out through ,the walls or in any other way. They are thus carried to the fire and burned up.

What I claim, and desire to secure by Letters Patent, is the following:'

1. The distributing-pipe dp, with supplypipes 19 connected therewith and adapted to discharge air into the fire-chamber, inclosed in air-space ac, the latter communicating with the ash-pit through fire-wall through openings 0', all combined substantially as described.

2. The distributing-pipe tip, with supplypipes connected therewith and adapted to discharge air into the fire-chamber, the steampipe 819, with means for connecting thesame with pipe dp, the air-space ac, communicating with the ash-pit through openings 0 in the wall between them, all combined substantially as described.

3. The nipple a, connected with the steampipe sp,a11d provided with nozzle I, the latter entering the distributing-pipe d d, the front end of the pipe to passing through the front F, with means for closing such end, all combined substantially as described.

4. In a furnace for steam-boilers, the front fire-chamber, the bridge wall bw, provided with air-flue cf, the chamber ch, the wall W, the

\ secondary chamber ch, the boiler B, and stack S, all combined substantially as described.

5. In a furnace for steam-boilers, the outer wall, 1, inner wall, 2, with continuous airspace ac between, front fire-chamber, wall bw, expansion-chamber ch, wall W, chamber ch, boiler B, and stackS, all combined substantially as described.

6. In a furnace for steam-boilers, inner wall, 2, having top 20, with space ha between it and the boiler, outer wall,-1, cover 10, having space ac between it and wall 2, with continuous space ac between walls 1 and 2 on sides and rear end, front combustion-chamber, wall Inc with air-flue cg and its receiving and discharging ports, chamber ch, wall W, chamber ch, boiler B, and stack S, all combined substantially as described.

7. In a furnace for steam-boilers, a front 4 fire-chamber inclosed in outer and inner walls, with air-space ac between, and backed by a bridge-wall, ba, provided with air-flue af, having receiving and discharging ports above and below the grate-bars, the pipes tip for distributing, and pipes 19 for supplying, air to the fire-chamber, the steam-pipe sp, with its connections, for forcing a current of air through pipes dp and p, the chamber ch, wall W, chamber ch, boiler B, and stack S, all combined substantially as described.

In witness whereof I have hereto set my hand this 6th day of September, 1883.

LEWIS METESSEB.

Witnesses O. P. JACOBS, F. J. VAN VORHIS. 

